We all know that our personal data is very valuable to marketers and other agencies—and that it's collected and sold by data brokers. StopDataMining.me is a master list of opt-out links to stop these data brokers from collecting information about your online and offline activities.

The list is similar to a previously featured compilation on Reddit, but seems to be more comprehensive. You'll find opt-out links and brief instructions for opting-out of (currently) 50 data mining companies, including data brokers Acxiom and Intelius, as well as direct marketers such as Valpak and Dex Media (distributors of phone books). (The image above, by the way, is from Axciom's own profile-revealing website, Aboutthedata.com, but since it requires you to verify information such as your last four SSN and birthday, privacy advocates suggest you skip the site.)